ArticleBody:Researchers may have cracked the code on crafting practically zero-emission “reactivated cement” by recycling it with its partner-in-pollution, steel. The University of Cambridge team detailed their process in a study published on Wednesday in Nature—an “absolute miracle,” according to first author and professor of engineering and the environment, Julian Norwood.
” The first step was to crush a demolished building’s waste concrete even more than usual to separate old cement from the leftover stone and sand. This “concrete paste” was then transferred to an electric arc furnace employed for steel recycling. Reforging steel requires something called a flux to bubble through its molten state and purify the metal, before creating an outer layer that protects steel from air.
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